Debt Disclosure [Text Block] LONG-TERM DEBT AND LIQUIDITY Derivative Instruments and Hedging Activities Disclosure [Text Block] DERIVATIVE FINANCIAL INSTRUMENTS Commitments and Contingencies Disclosure [Text Block] COMMITMENTS AND CONTINGENCIES Segment Reporting Disclosure [Text Block] SEGMENT OF BUSINESS INFORMATION CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net Income Net Income Net income Other Comprehensive Income (Loss), net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Other Comprehensive Income, Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Unrealized holding gains (losses) arising during period, net Reclassified to net income: Reclassified to net income [Abstract] Comprehensive Income, Net of Tax, Including Portion Attributable to Noncontrolling Interest Total Comprehensive Income Comprehensive Income, Net of Tax, Attributable to Parent Comprehensive income attributable to SCANA Corporation CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS Cash Flows From Operating Activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided from operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Income (Loss) from Equity Method Investments, Net of Dividends or Distributions Earnings from equity method investments, net of distributions Deferred Income Tax Expense (Benefit) Deferred income taxes, net Increase (Decrease) in Allowance for Equity Funds Used During Construction Carrying cost recovery Carrying Costs on Investment Income recorded to accrue a return on certain regulatory assets as granted by a regulator. Cash provided (used) by changes in certain assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Increase (Decrease) in Receivables Receivables Increase (Decrease) in Inventories Inventories Increase (Decrease) in Prepaid, Deferred Expense and Other Assets Prepayments and other Increase (Decrease) in Other Regulatory Assets Regulatory assets Increase (Decrease) in Regulatory Liabilities Regulatory liabilities Increase (Decrease) in Accounts Payable Accounts payable Increase (Decrease) in Accrued Income Taxes Payable Taxes accrued Increase (Decrease) in Interest Payable, Net Interest accrued Increase (Decrease) in Other Operating Assets Changes in other assets Increase (Decrease) in Other Operating Liabilities Changes in other liabilities Net Cash Provided by (Used in) Operating Activities Net Cash Provided From Operating Activities Cash Flows From Investing Activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Proceeds from investments and sale of assets Proceeds from Sale of Investments and Productive Assets The cash inflow from the sale of investments and productive assets during the period. Payments to Acquire Other Property, Plant, and Equipment Nonutility property additions Payments to Acquire Investments Purchase of investments Net Cash Provided by (Used in) Investing Activities Net Cash Used For Investing Activities Cash Flows From Financing Activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from Issuance of Common Stock Proceeds from issuance of common stock Proceeds from Issuance of Long-term Debt Proceeds from issuance of long-term debt Repayments of Long-term Debt Repayment of long-term debt Payments of Dividends Dividends Proceeds from (Repayments of) Short-term Debt Short-term borrowings, net Net Cash Provided by (Used in) Financing Activities Net Cash Used For Financing Activities Cash and Cash Equivalents, Period Increase (Decrease) Net Increase (Decrease) In Cash and Cash Equivalents Cash and Cash Equivalents, at Carrying Value Cash and Cash Equivalents, January 1 Cash and Cash Equivalents, September 30 Cash and cash equivalents Supplemental Cash Flow Information: Supplemental Cash Flow Information [Abstract] Income Taxes Paid, Net Cash paid for - Income taxes Noncash Investing and Financing Activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Construction in Progress Expenditures Incurred but Not yet Paid Accrued construction expenditures Cash Paid for Capitalized Interest Cash paid for interest, capitalized interest CONDENSED CONSOLIDATED STATEMENTS OF INCOME Operating Revenues: Revenues [Abstract] Electric Revenue Electric Regulated Operating Revenue, Gas Gas - regulated Unregulated Operating Revenue Gas - nonregulated Operating Expenses: Costs and Expenses [Abstract] Fuel Costs Cost of Purchased Power Cost of Purchased Oil and Gas Gas purchased for resale Operating Income (Loss) Operating Income Other Income (Expense): Nonoperating Income (Expense) [Abstract] Other Nonoperating Income Other income Other Nonoperating Expense Other expenses Interest Expense Interest charges, net of allowance for borrowed funds used during construction of $3, $7, $8 and $19 Nonoperating Income (Expense) Total Other Expense Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Cumulative Effects of Changes in Accounting Principles, Noncontrolling Interest Income Before Income Tax Expense and Earnings from Equity Method Investments Income Tax Expense (Benefit) Income Tax Expense Income Before Earnings from Equity Method Investments Income (Loss) from Continuing Operations before Equity Method Investments, Extraordinary Items, Cumulative Effects of Changes in Accounting Principles, Noncontrolling Interest This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses and taxes from ongoing operations after income tax expense or benefits, but before income or loss from equity method investments, extraordinary items, cumulative effects of changes in accounting principles, and noncontrolling interest. Income (Loss) from Equity Method Investments Earnings from Equity Method Investments Preferred Stock Dividends Less Preferred Stock Dividends of Subsidiary Net Income (Loss) Available to Common Stockholders, Basic Income Available to Common Shareholders of SCANA Earnings Per Share, Basic Basic Earnings Per Share of Common Stock (in dollars per share) Earnings Per Share, Diluted Diluted Earnings Per Share of Common Stock (in dollars per share) Weighted Average Number of Shares Outstanding, Basic Weighted Average Common Shares Outstanding, Basic (millions) (in shares) Weighted Average Number of Shares Outstanding, Diluted Weighted Average Common Shares Outstanding, Diluted (millions) (in shares) Common Stock, Dividends, Per Share, Declared Dividends Declared Per Share of Common Stock (in dollars per share) Public Utilities, Allowance for Funds Used During Construction, Additions CONDENSED CONSOLIDATED BALANCE SHEETS Assets Assets [Abstract] Public Utilities, Property, Plant and Equipment, Plant in Service Utility Plant In Service Public Utilities, Property, Plant and Equipment, Accumulated Depreciation Accumulated Depreciation and Amortization Public Utilities, Property, Plant and Equipment, Amount of Construction Work in Process Included in Rate Base Construction Work in Progress Nuclear Fuel, Net of Amortization Nuclear Fuel, Net of Accumulated Amortization Public Utilities, Property, Plant and Equipment, Amount of Acquisition Adjustments Public Utilities, Property, Plant and Equipment, Net Utility Plant, Net Nonutility Property and Investments: Nonutility Property and Investments [Abstract] Property, Plant and Equipment, Net Nonutility property, net of accumulated depreciation of $115 and $107 Assets Held-in-trust Nonutility Property and Investments, Net Nonutility Property and Investments, Net Amount representing the nonutility properties and investments as of the balance sheet date. Current Assets: Assets, Current [Abstract] Accounts Receivable, Net, Current Receivables, net of allowance for uncollectible accounts of $7 and $9 Inventories (at average cost): Inventory, Net [Abstract] Energy Related Inventory Fuel and gas supply Inventory, Raw Materials and Supplies Assets, Current Total Current Assets Regulatory Assets, Noncurrent Regulatory assets Other Assets, Noncurrent Other Total Assets Total Capitalization and Liabilities Liabilities and Stockholders' Equity [Abstract] Long-term Debt, Excluding Current Maturities Long-Term Debt, net Current Liabilities: Liabilities, Current [Abstract] Short-term Borrowings Short-term borrowings Long-term Debt, Current Maturities Current portion of long-term debt Accounts Payable, Current Accounts payable Customer Advances and Deposits, Current Customer deposits and customer prepayments Accrued Income Taxes, Current Taxes accrued Interest Payable, Current Interest accrued Dividends Payable, Current Dividends declared Other Liabilities, Current Other Liabilities, Current Total Current Liabilities Deferred Credits and Other Liabilities: Liabilities, Noncurrent [Abstract] Accumulated Deferred Investment Tax Credit Deferred investment tax credits Asset Retirement Obligations, Noncurrent Asset retirement obligations Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent Pension and other postretirement benefits Regulatory Liability, Noncurrent Regulatory liabilities Other Liabilities, Noncurrent Other Liabilities, Noncurrent Total Deferred Credits and Other Liabilities Commitments and Contingencies. Commitments and Contingencies (Note 7) Liabilities and Stockholders' Equity Total Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Nonutility property, accumulated depreciation Allowance for Doubtful Accounts Receivable, Current Receivables, allowance for uncollectible accounts Interest Paid, Net Cash paid for - Interest (net of capitalized interest of $8 and $19) Other Comprehensive Income, Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax Losses on cash flow hedging activities Comprehensive Income, Net of Tax, Attributable to Noncontrolling Interest Less Comprehensive income attributable to noncontrolling interest Utilities Operating Expense, Maintenance and Operations Other operation and maintenance Utilities Operating Expense, Depreciation and Amortization Depreciation and amortization Utilities Operating Expense, Taxes Other taxes Utilities Operating Expense Total Operating Expenses Regulated and Unregulated Operating Revenue Total Operating Revenues Amortization Payments to Acquire Property, Plant, and Equipment Utility property additions and construction expenditures Other Comprehensive Income, Reclassification of Defined Benefit Plan Net Transition Asset (Obligation), Recognized in Net Periodic Benefit Cost, Net of Tax Amortization of deferred employee benefit plan costs, net of taxes Other Long-term Investments Other investments Other Inventory Emission allowances Capitalization, Long-term Debt and Equity Total Capitalization Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Document and Entity Information Deferred Tax Assets (Liabilities), Net, Current Deferred income taxes Common Equity Common Shareholders' Equity Total of all Stockholders' Equity items other than those pertaining to Preferred Stock. Includes the following: Common Stock at Par, Common Stock Additional Paid-in Capital, Retained Earnings, and Accumulated Other Comprehensive Income (Loss). Deferred Tax Assets (Liabilities), Net, Noncurrent Deferred income taxes, net Depreciation, Depletion and Amortization Managements' Opinion [Text Block] Managements' Opinion This element represents the managements' opinion regarding the financial statements and the necessary adjustments made for the fair statement of the results for the reporting period. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Summary of Significant Accounting Policies and Impact of Recent Accounting Pronouncements [Text Block] This element may be used to describe all significant accounting policies of the reporting entity, an entity's explanation that the preparation of financial statements in conformity with generally accepted accounting principles requires the use of management estimates and the impact of recently issued accounting standards. COMMON EQUITY Common Equity Disclosure [Text Block] This element represents total of all Stockholders' Equity items other than those pertaining to Preferred Stock. Includes the following: Common Stock at Par, Common Stock Additional Paid-in Capital, Retained Earnings, and Accumulated Other Comprehensive Income (Loss). This element also represents the entire disclosure for the issue of common stock for cash and through various compensation and reinvestment plans. Fair Value Disclosures [Text Block] FAIR VALUE MEASUREMENTS, INCLUDING DERIVATIVES Public Utilities, Property, Plant and Equipment, Plant Acquisition Adjustments for Intangible Utility Plants Other Inventory, Supplies Materials and supplies Other Assets, Current Prepayments and other Deferred Debits and Other Assets: Regulated Entity, Other Assets, Noncurrent [Abstract] Regulated Entity, Other Assets, Noncurrent Total Deferred Debits and Other Assets Stockholders' Equity Attributable to Parent Common Equity Preferred Stock Temporary Equity, Carrying Amount Utilities Operating Expense, Fuel Used Fuel used in electric generation Utilities Operating Expense, Purchased Power Purchased power Public Utilities, Allowance for Funds Used During Construction, Capitalized Cost of Equity Allowance for equity funds used during construction Allowance for equity funds used during construction Public Utilities, Allowance for Funds Used During Construction, Capitalized Interest Interest charges, allowance for borrowed funds used during construction Depreciation, Amortization and Accretion, Net Depreciation and amortization Amortization of nuclear fuel The current period expense charged against earnings for the amortization of nuclear fuel to recognize its cost over its useful live. Amortization of Nuclear Fuel Stockholders' Equity Note Disclosure [Text Block] COMMON EQUITY REGULATORY MATTERS Public Utilities Disclosure [Text Block] Assets held in trust, net-nuclear decommissioning Decommissioning Fund Investments SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES REGULATORY MATTERS LONG-TERM DEBT AND LIQUIDITY COMMON EQUITY DERIVATIVE FINANCIAL INSTRUMENTS FAIR VALUE MEASUREMENTS, INCLUDING DERIVATIVES COMMITMENTS AND CONTINGENCIES SEGMENT OF BUSINESS INFORMATION Managements' Opinion Changes in fuel adjustment clauses Increase (Decrease) in Regulatory Clause Revenue Other Comprehensive Income, Reclassification Adjustment for Sale of Securities Included in Net Income, Net of Tax Reclassified for losses include in net income Pension asset Increase (Decrease) in Deferred Pension Costs Goodwill, net of accumulated amortization and writedown of $276 Goodwill. Accumulated Amortization and Writedown, Goodwill Amount of acquisition adjustments recognized during the period that results from the amortization and write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment. Goodwill, accumulated amortization and writedown Statement, Scenario [Axis] Scenario, Unspecified [Domain] Statement Statement [Line Items] Statement [Table] Class of Stock [Domain] Class of Stock [Axis] Capital Lease Obligations Incurred Capital lease of gas utility plant Derivative financial instruments Interest Rate Cash Flow Hedge Liability At Fair Value